Storage device having degauss circuitry configured for generating degauss signal with asymmetric decay envelopes
US8873188B2 · kind B2 · utility
2Cited by
14References
20Claims
0Family size
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Key dates
| Filing date | Apr 30, 2013 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Apr 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hard disk drive or other storage device comprises a storage medium, a write head configured to write data to the storage medium, and control circuitry coupled to the write head. The control circuitry comprises degauss circuitry coupled to or otherwise associated with one or more write drivers. The degauss circuitry is configured to generate an asymmetric degauss signal to be applied to the write head. The asymmetric degauss signal has a waveform with upper and lower decay envelopes that are asymmetric about a specified degauss current level, such as a substantially zero current level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.